package util;

import java.io.UnsupportedEncodingException;
import java.security.MessageDigest;
import java.security.NoSuchAlgorithmException;
import java.text.SimpleDateFormat;
import java.util.Date;

public class Helper {
    /**
     * 得到当前的时间 
     */
    public static String getNowTime() {
        SimpleDateFormat sdf    = new SimpleDateFormat("yyyy-MM-dd HH:mm:ss");
        Date now    = new Date();
        
        return sdf.format(now).toString();
    }
    
    /** 
     * MD5 加密 
     */  
    public static String getMD5Str(String str) {  
        MessageDigest messageDigest = null;  
        try {  
            messageDigest = MessageDigest.getInstance("MD5");  
            messageDigest.reset();  
            messageDigest.update(str.getBytes("UTF-8"));  
        } catch (NoSuchAlgorithmException e) {  
            System.out.println("NoSuchAlgorithmException caught!");  
            System.exit(-1);  
        } catch (UnsupportedEncodingException e) {  
            e.printStackTrace();  
        }  
  
        byte[] byteArray = messageDigest.digest();  
        StringBuffer md5StrBuff = new StringBuffer();  
        for (int i = 0; i < byteArray.length; i++) {              
            if (Integer.toHexString(0xFF & byteArray[i]).length() == 1) { 
                md5StrBuff.append("0").append(Integer.toHexString(0xFF & byteArray[i])); 
            } else { 
                md5StrBuff.append(Integer.toHexString(0xFF & byteArray[i])); 
            }
        }  
  
        return md5StrBuff.toString();  
    }
    
    /**
     * 得到时间截，当前的 
     */
    public static long getTimeStamp() {
        return new Date().getTime();
    }
   
    /**
     * 对象转换成整数 
     */
    public static int obj2Int(Object obj) {
       if(obj == null) {
           return 0;
       }
       
       return Integer.parseInt(obj.toString());
    }
    
}
